This is a 15x15 Cave/Akari hybrid I created. If it feels a bit overwhelming, make sure to try the 10x10 teaser first.
Cells have to be shaded to create cave walls, such that these walls are orthogonally connected to the edges of the grid. The unshaded cells (the cave) need to remain orthogonally connected to each other to be able to traverse the cave. The cave also needs to be fully lit up, so lightbulbs need to be placed throughout the cave. Lightbulbs light up the cave in each orthogonal direction until a wall is reached. Two lightbulbs are not allowed to see each other.
Every clue in the grid is either a Cave (unshaded) or an Akari clue (shaded). Cave clues indicate how many cave cells it sees in orthogonal directions, including itself. Akari clues are part of the wall and indicate how many lightbulbs are orthogonally adjacent to the clue.
An example of what a finished grid could look like is shown below. Orange cells are lightbulbs.
Solve on Penpa
Lösungscode: For each row: total of lightbulbs + different wall segments, from top to bottom. The example puzzle would be 441224 (e.g. row 1 has 2 lightbulbs and 2 wall segments, so it is a 4 in the solution code).
am 15. März 2021, 20:09 Uhr von MartinR
That was tricky, but very satisfying to complete :)
--- Makes me happy to hear that :)
am 6. Dezember 2020, 14:22 Uhr von Mark Sweep
Thanks for your nice comments! I'm glad to hear you enjoyed it!
am 4. Dezember 2020, 16:11 Uhr von Jesper
Great puzzle! The two rulesets combine really nicely in this hybrid.
am 4. Dezember 2020, 14:37 Uhr von MagnusJosefsson
Wonderful puzzle! Very nice and consistently challenging!